Auora, It more depends where you live
In Williamsburg and Boro Park (Brooklyn) I think less have Succahs and the ones that I see are mostly on a Balcony (You can only use the Balcony if there is nothing on top of the Balcony and it goes straight up to the Sky)
many people there live in Apartment Buildings. In Manhattan Lower East Side and the Upper West Side almost nobody has succahs.
The rest of the City is probably more private houses.
And Even those Balcony Succahs, I am not sure exactly how someone would sleep in one, they are tiny and barely enough room many times just to eat on a Card table